Loose-leaf-binder post



W. C. WILLIAMS.

-LO0SE LEAF BINDER POST.

APPLICATION FILED SEPT. 28, 1915.

1,1 96,059. PatentedAug. 29,1916.

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WITNESSES INVENTOR WILLIAM C. WILLIAMS, OF BALTIMORE, MARYLAND.

LOOSE-LEAF-BINDER POST.

Specification of Letters Patent.

Patented Aug. 29, 1916.

Application filed September 28, 1915. Serial No. 53,048.

To all whom it may concern:

Be it known that I, WILLIAM C. WViLLIAMs, a citizen of the United States, and a resident of the city of Baltimore and State of Maryland, have invented a certain new and useful Improvement in Loose-Leaf-Binder Posts, of which improvement the following is a specification.

My invention relates to extension posts for loose-leaf binders, and its object is to provide a post of such type as shall be of simple and inexpensive construction, not permanently attached to either of the covers of a binder, of ready adaptability to use in the adjustment and maintenance of leaves in transfer binders or covers of any of the ordinary forms, and free from objectionable projection beyond the covers of binders.

The improvement claimed is hereinafter fully set forth.

In the accompanying drawings, Figure 1 is a longitudinal section through a binder post embodying my invention, on the lines 0 a: of Figs. 2 and 3; Fig. 2, a transverse section, on the line 3 g of Fig. 1; Fig. 3, a similar section, on the line 2 2 of Fig. 1; and Fig. 4, a plan or top view.

In the practice of my invention, I provide a lower or fixed section, which is in the form of a cylindrical body, 1, open at top and closed at bottom by a circular plate, 1*. A plurality of parallel circumferential ribs, 1 of dove-tail section, extend longitudinally on the body, 1, from its top to the plate, 1*, said ribs being curved peripherally to the same radius as said plate, and an internal screw thread, 1, is cut in the body, in which there is also formed a longitudinal slot, 1 between two of the ribs, 1. A screw, 1 is formed on or fixed to the bottom plate, 1, to enable the length of the fixed portion of the post to be increased if desired, by attaching thereto a solid section of post; otherwise it is used to fasten the post in the screw socket of a binder cover.

An upper or extension section is fitted on the lower section, 1, said extension section comprising a circular top plate, 2, corresponding in diameter with the bottom plate, 1 of the lower section, and a plurality of longitudinal ribs, 2 depending from the plate, 2, said ribs corresponding in number with the ribs, 1*, of the lower section and being curved peripherally to the same radius. The ribs, 2, are separated by spaces, corresponding in transverse contour with the ribs, 1 of the lower section, but sufficiently larger to permit the latter to fit neatly within them. When so fitted, the post presents a substantially continuous cylindrical periphery throughout, when the upper and lower sections are adjusted to the minimum height of the post, and which is of uniform diameter throughout in other. adjustments.

The adjustment of the extension section, toward and from the lower section, is effected by an adjusting screw, 3, having a fiat milled head, 3 of the same diameter as the top plate, 2, and fitting on said plate, which screw is journaled centrally in said plate, and engages the internal thread, 1, cut in the body, 1, of the lower section. A stop pin, 2, fixed in one of the ribs, 2 of the extension section, projects into the slot, 1, of the lower section, and prevents the separation of the extension section therefrom, when the extension section has been raised to the maximum degree permitted by the contact of the pin with the upper end of the slot.

In the operation of the device, the extension section is raised or lowered to effect the lengthening or shortening, respectively, of the post, as desired, by the rotation of the milled head of the adjusting screw, in one or the other direction, and loose leaves, in greater or less number, may be readily inserted in, and transferred from, binders without projection of the post beyond the covers thereof. This operation is materially facilitated by the uniform cylindrical contour of the binder post throughout its length.

I claim as my invention and desire to secure by Letters Patent:

1. In a loose-leaf binder post, the combination of a lower section comprising a circular bottom plate, a cylindrical body, and a plurality of longitudinal ribs, of dovetail section, projecting from the body and corresponding peripherally with the bottom plate; an extension section comprising a top plate of the same diameter as the bottom plate of the lower section, and a plurality of longitudinal ribs corresponding peripherally with those of the bottom section and fitting in the spaces between them; and an adjusting screw journaled in the extension section and engaging a thread in the body of the lower section.

2. In a loose-leaf binder post, the combination of a lower section comprising a circular bottom plate, a cylindrical body, and a plurality of longitudinal ribs, of dove-tail section, projecting from the body and corresponding peripherally with the bottom plate; an extension section comprising a top plate of the same diameter as the bottom plate of the lower section, and a plurality of longitudinal ribs corresponding peripherally with those of the bottom section and fitting in the 1 spaces between them; and an adjusting screw journaled in the top plate of the extension and having a flat milled head fitting on said plate, said screw engaging a thread in the body of the lower section.

3. In a loose-leaf binder post, the combination of a lower section comprising a circular plate, a cylindrical body, and a plurality of ribs, of dovetail section, projecting from the body and corresponding peripherally with the bottom plate; an extension section comprising a top plate of the same diameter as the bottom plate of the lower section; and a plurality of longitudinal ribs corresponding peripherally with those ofthe bottom section and fitting in the spaces between them; a

stop pin fixed to one of said ribs and projecting into a longitudinal slot in the body of the lower section; and an adjusting screw journaled in the extension section and engaging a thread in the body of the lower section.

4:. In a looseleaf binder post, the combination of a lower section comprising a circular plate, a cylindrical body, and a plurality of ribs, of dove-tail section, projecting from the body and corresponding peripherally with the bottom plate; an extension section comprising a top plate of the same diameter as the bottom plate of the lower section; and a plurality of longitudinal ribs corresponding peripherally with those of the bottom section and fitting in the spaces between them; a stop pin fixed to one of said ribs and projecting into a longitudinal slot in the body of the lower section; an adjusting screw journaled in the extension section and engaging a thread in the body of the lower section; and a screw formed on or fixed to the bottom plate, permitting expansion-of a binder to any extent desired by engaging said screw with the thread of a solid section of post.

In testimony whereof, I alfix my signature in the presence of two witnesses.

IVILLIAM C. WILLIAMS.

Witnesses:

CHARLES S. STOUT, HENRY D. BOYD.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

